385445 divided by 91 
The aim is to understand the frequency of 91 in 385445.

On to step 1:
When dividing 3 by 91, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 91

Step 2:
91 can be fit into 38 0 times, resulting in a remainder of 38.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 38 leaves us with 38.
Include the next digit (5) from the dividend after 38, then repeat: 385 / 91

Advancing to step 3:
If we divide 385 by 91, we get 4 and a remainder of 21.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 21 after subtracting 364 from 385.
Include the next digit (4) from the dividend after 21, then repeat: 214 / 91

Moving on to step 4:
The number 91 fits into 214 2 times, leaving a remainder of 32.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
The remainder is 32 after subtracting 182 from 214.
Fetch the next digit (4) from the dividend, attach it to 32 and continue: 324 / 91

Let's proceed to step 5:
91 goes into 324 3 times with a remainder of 51.
Write down 3 as next digit of the result. 
Result so far: 423.0
Subtract 273 from 324 to get 51.
Take the next digit (5) from the dividend and append it to 51, then repeat: 515 / 91

Moving on to step 6:
The number 91 fits into 515 5 times, leaving a remainder of 60.
The number 5 becomes the next digit in our result. 
Result so far: 4235.0
Subtracting 455 from 515 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 7:
When dividing 600 by 91, we get 6 with a remainder of 54.
The next digit of our result is 6. 
Result so far: 4235.6
Subtracting 546 from 600 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 8:
91 can be fit into 540 5 times, resulting in a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 4235.65
Subtracting 455 from 540 leaves us with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 9:
850 divided by 91 is 9 with a remainder of 31.
Put 9 as the next digit of the answer. 
Result so far: 4235.659
Subtracting 819 from 850 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 10:
The number 91 fits into 310 3 times, leaving a remainder of 37.
Put 3 as the next digit of the answer. 
Result so far: 4235.6593
Subtracting 273 from 310 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 11:
370 divided by 91 is 4 with a remainder of 6.
The next digit of our result is 4. 
Result so far: 4235.65934
The remainder is 6 after subtracting 364 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 12:
91 goes into 60 0 times with a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 4235.65934
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 13:
If we divide 600 by 91, we get 6 and a remainder of 54.
Record the quotient 6 as the next digit in the result. 
Result so far: 4235.6593406
Deduct 546 from 600 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 14:
When dividing 540 by 91, we get 5 with a remainder of 85.
Write down 5 as next digit of the result. 
Result so far: 4235.65934065
Subtracting 455 from 540 leaves us with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

The final result is 4235.65934065 with a remainder of 8.5e-08.